JPS6022965Y2 - filtration device - Google Patents

Description

[Detailed description of the invention] This invention allows the liquid to be treated to be filtered in the filtration device using either a down-flow or up-flow filtration method. To further explain the details of the present invention based on the illustrated embodiment, the present invention relates to a filtration device in which the inside of the filter medium can be cleaned by operating the filter medium B1. An upper strainer 1 is installed at the upper part of A, and a lower strainer 2 is installed at the lower part of the A.The upper and lower strainers 1 and 2 are connected to two L-shaped three-way valves 3 and 4, and the L-shaped three-way valves 3 and 4 are connected to each other. A pipe 5 is used to connect the connecting pipes 5 to 5, and a pipe 6 for supplying liquid from the outside is connected to the intermediate part of the connecting pipe 5, and a pipe 7 for taking out each liquid from the three-way valves 3 and 4 to the outside. 8. For example, when using a down-flow one-way filtration method, the L-shaped three-way valves 3 and 4 are turned on as shown by the solid line in the drawing, and raw water is supplied from the liquid supply inlet. As a result, the raw water is supplied from the upper strainer 1 into the closed container A, passes through the filter medium B, and is then taken out from the lower strainer 2 through another L-shaped three-way valve 4 to the outside as a treated liquid from the take-out pipe 3. This is supplied to each system, but when this filter medium B becomes clogged, etc., the cleaning liquid is made to flow back into the airtight container A, which is the filtration device, and the solid line state described above is achieved to wash the filter medium B. By rotating the L-shaped three-way valves 3 and 4 to the imaginary line state, and then supplying liquid for washing the appropriate filter medium B from the liquid supply port 6, the liquid is transferred from the inlet to the L-shaped three-way valve on one side. It is supplied from the lower strainer 2 to the closed container A through the valve 4,
The liquid passes through the upper strainer from the bottom of filter medium B upwards.
The filter medium B is discharged from the extraction pipe 7 through another L-shaped three-way valve 3 to the outside, and the filter medium B is appropriately washed by performing this treatment step continuously or intermittently.

Although not shown in the figure, when adopting an up-flow filtration method, the water flows in the above-mentioned filtration state and washing state in the opposite direction, that is, the raw water supplied from the liquid supply inlet is flowed in the imaginary line state in the example. If the water is passed in the direction, filtration can be performed, and if the cleaning liquid supplied from the liquid supply inlet is passed in the direction of the solid line in the figure, backwashing can be performed.

In addition, when it is desired to stop the supply of the liquid to be treated and the feeding of the processing liquid in the present invention, the double-sided three-way valve 3.4 is rotated in the direction of the liquid supply inlet in the figure. In this state, the L-shaped three-way valve 3.4 on the left side is set to the imaginary line state, so that the liquid supply is stopped and the liquid in the closed container A is prevented from flowing out to the outside.

By supplying the liquid to be treated from the liquid supply inlet as described above, the filtration device according to the present invention can perform either the down-flow one-way filtration method or the up-flow one-way filtration method using the filter medium inside the closed container by simply operating the valve. In addition to being processed in the same way as a general filtration device with the same device, if you want to wash the filter medium by supplying cleaning liquid in the opposite direction, for example, if you use a down-flow filtration method, this L type By arranging the three-way valve as shown in the imaginary line in the figure, it can be easily cleaned, and by simply operating the valve, three types of filtration by the filter medium, washing of the filter medium by the cleaning liquid, and stopping the supply or outflow into the closed container can be adopted as appropriate. It is something that can be done.

As described above, the filtration device according to the present invention has an L-shaped three-way valve that connects the upper strainer and the outlet pipe to the outside, and an L-type three-way valve that connects the lower strainer and the outlet pipe to the outside. By connecting and providing an inlet for supplying liquid from the outside in the middle part of the connecting pipe, by operating these three-way valves, it is possible to process the liquid to be treated using either the down-flow or up-flow filtration method. In addition, it is possible to wash the filter medium and keep it in a sealed state, and the raw water as the liquid to be treated and the cleaning liquid can be supplied from the same liquid supply inlet, which is preferable since only one inlet is required.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment to which the present invention is applied, and FIG. 2 is a flowchart illustrating the piping state of the present invention. A: Sealed container, B: Filter medium, 1: Upper strainer, 2: Lower strainer - 13: Three-way valve, 4: Three-way valve, 5: Connecting pipe, 6: Inlet for liquid supply, 7: Take-out pipe, 8: Take-out pipe .

Claims (1)

[Scope of utility model registration request] An upper strainer is installed at the top of the airtight container filled with filter media, and a lower strainer is installed at the bottom.
Connect the L-shaped three-way valves to each L-shaped three-way valve, connect the L-shaped three-way valves with a pipe, and connect the inlet for liquid supply from the outside to the middle part of this connecting pipe. A filtration device characterized by being provided with.